ServletRequest java提供的请求对象根接口
HttpServletRequest java提供的对http协议封装的请求对象接口
RequestFacade Tomcat定义的实现类
请求行
String rMethod = req.getMethod();//获取请求方式
System.out.println("请求方式" + rMethod);//GET
String cPath = req.getContextPath();//获取虚拟目录
System.out.println("虚拟目录" + cPath);///request-demo
StringBuffer stringBuffer = req.getRequestURL();//获取URL统一资源定位符
System.out.println("统一资源定位符" + stringBuffer);//http://localhost:8088//request-demo/demo1
String rURI = req.getRequestURI();//统一资源标识符
System.out.println("统一资源标识符" + rURI);//【//request-demo/demo1
String param = req.getQueryString();//请求参数
System.out.println("请求参数" + param);//username=zhangsan
请求头
String uAstr = req.getHeader(" user-agent");
System.out.println("User-Agent" + uAstr);
请求体
BufferedReader br = req.getReader();//获取字符输入流
String line = br.readLine();//读取数据
System.out.println("数据" + line);
